▎ 摘　　要

NOVELTY - Method for preparing biological organic compound fertilizer involves (i) dissolving graphene oxide in 0.1-1 mol/l alkali liquid, adding mushroom bran, removing lignin in the mushroom bran and releasing cellulose, (ii) adding Elymus nutans powder, (iii) treating using cellulose, hydrolyzing cellulose, and drying to obtain the product. USE - The method is used for preparing biological organic compound fertilizer. ADVANTAGE - The method improves degradation efficiency of cellulose, optimizes nutrient component, and adjusts carbon-nitrogen specific value in mushroom bran, and enhances nutritional value. The fertilizer avoids direct application of mushroom bran to cause soil microorganisms and crops to compete with nitrogen source.